[ALSA] AK4114 - listing regs in proc

A simple patch for listing AK4114 regs in proc.
Signed-off-by: Pavel Hofman <dustin@seznam.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/i2c/other/ak4114.c

@@ -27,6 +27,7 @@
 #include <sound/pcm.h>
 #include <sound/ak4114.h>
 #include <sound/asoundef.h>
+#include <sound/info.h>
 
 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
@@ -446,6 +447,26 @@ static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
 }
 };
 
+
+static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
+		struct snd_info_buffer *buffer)
+{
+	struct ak4114 *ak4114 = entry->private_data;
+	int reg, val;
+	/* all ak4114 registers 0x00 - 0x1f */
+	for (reg = 0; reg < 0x20; reg++) {
+		val = reg_read(ak4114, reg);
+		snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
+	}
+}
+
+static void snd_ak4114_proc_init(struct ak4114 *ak4114)
+{
+	struct snd_info_entry *entry;
+	if (!snd_card_proc_new(ak4114->card, "ak4114", &entry))
+		snd_info_set_text_ops(entry, ak4114, snd_ak4114_proc_regs_read);
+}
+
 int snd_ak4114_build(struct ak4114 *ak4114,
 		     struct snd_pcm_substream *ply_substream,
 		     struct snd_pcm_substream *cap_substream)
@@ -478,6 +499,7 @@ int snd_ak4114_build(struct ak4114 *ak4114,
 			return err;
 		ak4114->kctls[idx] = kctl;
 	}
+	snd_ak4114_proc_init(ak4114);
 	/* trigger workq */
 	schedule_delayed_work(&ak4114->work, HZ / 10);
 	return 0;